What are the cutoff levels for marijuana according to DOT regulations?

The cutoff levels for marijuana according to DOT regulations are established to help ensure accurate and consistent testing results in drug screening processes. The correct answer indicates that the cutoff for initial tests is set at 50 ng/mL, while the confirmation tests have a cutoff level of 15 ng/mL.

These thresholds have been determined based on extensive research and are reflective of levels that effectively distinguish between non-use and potential impairment. The use of higher cutoff levels for initial tests helps reduce the occurrence of false positives attributable to trace amounts that may come from passive exposure or other sources, while the lower confirmation test levels ensure greater specificity in identifying actual use.

The choice of these levels is critical in maintaining the integrity of the testing process in workplaces, particularly in safety-sensitive positions regulated by the Department of Transportation. Understanding these levels is essential for compliance with DOT regulations and maintaining a safe working environment.